Jonathan Tsai
Hospitalist Physician · San Leandro, CA
Jonathan Tsai is a hospitalist physician with a practice address in San Leandro, California, and NPI 1497252522, issued on Apr 6, 2018. Check the license (California 180276, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan Tsai
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 180276 CA
311648 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2500 Merced St, San Leandro, CA 94577
- Phone
- (510) 514-2872
- Enumerated
- Apr 6, 2018
- Record last updated
- Aug 21, 2023
- Medicare enrollment
- Enrolled (PECOS I20231206002970); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 2500 Merced St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rabiatu Abdullah, M.D.Emergency Medicine Physician1497833248
- Scott Abramson, M.D.Neurology Physician1891873667
- Jayaprada Achanta, M.D.Anesthesiology Physician1053463851
- Kristi Adachi, PHARMDPharmacist1396456737
- Mary Grace Aguayo, CRTCertified Respiratory Therapist1467923730
- Jatinder AhluwaliaPharmacist1508391483
Verify Jonathan Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 180276Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average hospitalist physician in 2024
349 Medicare Part D claims for 164 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Doxycycline Monohydrate20 claims
- Prednisone20 claims
- Furosemide18 claims
- Oxycodone Hcl18 claims
- Cefpodoxime Proxetil15 claims
- Pantoprazole Sodium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Permanente Medical Group IncSan Leandro, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Tsai among 3,099 hospitalist physician records in California
Jonathan Tsai is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 77% of them.
- NPI issued2018 · 77% of these records are older, 19% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2018 · median 2010 among the 2,505 with a school on file
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in San Leandro → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Mayank AminSan Leandro, CA 945771891180972
- Abida Azim, M.D.San Leandro, CA 945771447338298
- James Chang, M.D.San Leandro, CA 945771801158332
- Rose Eng, M.D.San Leandro, CA 945771881744605
- Michael Esteban, M.D.San Leandro, CA 945771821176637
- Christopher Gee, M.D.San Leandro, CA 945771902984727
- Jena Joy, MDSan Leandro, CA 945771992071229
- Trupti Mehta, M.D.San Leandro, CA 945771609954460
Common questions
What is Jonathan Tsai's NPI number?
Jonathan Tsai's National Provider Identifier (NPI) is 1497252522, issued on Apr 6, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Tsai located?
The NPPES record lists a practice address at 2500 Merced St, San Leandro, CA, 94577. Phone: (510) 514-2872. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Tsai's license?
NPPES lists California license number 180276, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathan Tsai prescribe under Medicare Part D?
In 2024, Jonathan Tsai had 349 Medicare Part D claims for 164 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Jonathan Tsai's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.